Answer:
Age of rock = 21112000000 years
Explanation:
The half-life of a radioactive material is the time taken for half the original material to decay or it is the time required for a quantity to reduce to half of its initial value.
The ratio of parent isotope, Uranium-235 to daughter isotope, Lead-207 = 6 : 42 = 1 : 7
This means that for every one gram of the parent isotope, there are 7 grams of the daughter isotope. So,the quantity of radioactive material left is one out of eight its original value.
Number of half-lives undergone for 1/8 of the original value to to remain is given below:
1/8 = 1/2 × 1/2 × 1/2
Therefore, number of half-lives = 3 half-lives
Age of rock = half-life of Uranium -235 × number of half-lives
The half-life of Uranium-235 is 704 million years = 704000000
Age of rock = 704000000 × 3
Age of rock = 21112000000 years
Are these ramen noodles expired?
Answer:
it depends on the numbers on the bottom they foretell the nono time to eat
Answer:
they look fine, just check the expiration date and make sure the package wasn't already opened.
Explanation:
they look good to me though, so I'd say eat up!
If radioactive Forcing were to increase in a particular region of earth what would you expect to happen to average temperatures
In geothermal power systems temperature and pressure inside Earth ____ with depth
A. Increase
B. Decrease
help me help me help me help me help me help me help me help me help me help me
Answer:
A
Explanation:
am not to sure but it mostly likely is hopefully this helps you
Where are the best geothermal resources located in the U.S?
A. West Coast
B. East Coast
C. South
D. Midwest
help me help me help me help me help me please please
the west coast
Explanation:
yeah it mostly likely that
 HURRY I HAVE A TIME LIMIT!
Humans, cats, whales, and bats all have similar arm bones. What piece of evidence for common ancestry does this describe?
-homology
-embryology
-fossil record
-amino acids sequences
Answer:
Homology
Explanation:
Homology, in biology, similarity of the structure, physiology, or development of different species of organisms based upon their descent from a common evolutionary ancestor.
2. Prokaryotes differ from eukaryotes by all of the
following characteristics EXCEPT:
A. kinds of nucleotides in their DNA
B. structure of their flagella
C. structure of their plasma membranes
D. structure of their chromosomes
E. methods of cell division
Answer:
C. structure of their plasma membranes
Explanation:
hope it helps
pls answer soon 8th grade science
Answer: 1. Is true 2. is false 3. Is true 4 is true 5. Is false 6. Is true 7. Is false 8. Is true 9. Is true 10 is false 11. Is false
I couldn’t answer so I just commented the answers to part 1
Part b. 12. B, 13. E, 14. A, 15. D, 16. C.
now I did as a actua answer
Explanation:
200g of water at 90degree Celsius is mixed with 100g of water at 30 degree Celsius. What is the final temperature (C of water =4.2jkg-1 k-1
Answer:
70 °C
Explanation:
Since heat lost by 200 g of water = heat gained by 100 g of water
-mc(T - T') = m'c(T - T")
where m = 200 g,T' = 90°C, m' = 100 g,T" = 30°C and T = final temperature of mixture, c = specific heat capacity of water = 4.2jkg-1 k-1.
Substituting the values of the variables into the equation, we have
-mc(T - T') = m'c(T - T")
-200 g(T - 90 °C) = 100 g(T - 30 °C)
(T - 90 °C) = 100 g(T - 30 °C)/-200 g
(T - 90 °C) = -0.5(T - 30 °C)
T - 90 °C = -0.5T + 15 °C
collecting like terms, we have
T + 0.5T = 90 °C + 15 °C
1.5T = 105 °C
T = 105 °C/1,5
T = 70 °C
plzz help mark brainiest 10 points
Answer:
B
Explanation:
Sunrise you will see a full moon
ASAP!! HELP ME WITH THESE pls :(
Question 1.Which moon phase starts and ends in the moon cycle?
Question 2 : How many days between each moon phase ?
Answer:
1. new moon
2. seven
Explanation:
:)
Answer:
there are 4 important phase. full moon is the first phase and new moon is what it ends.
it takes 27days between each moon phase
Ferns tend to live in which of the following habitats?"
moist and sunny
moist and shady
O dry and sunny
Odry and shady
Answer:
Moist and shaddy
Explanation:
Which is true for urochordates? *
Pls help meeee I’m stuck and thank you so much
Answer:
The answers is b
If a 25 kg car accelerates at a speed of 100m/s2,2 what will the force of the car be? Plug in the numbers: Force = mass x acceleration
what is the difference between the way that saprotrophs and detritivores digest their food
Answer:
Externally
Explanation:
Usually, detritivores are mostly animals, while saprotrophs are mostly fungi. Furthermore, detritivores consume lumps of dead organic matter separately, while saprotrophs absorb chemically digested food. Saprotrophs digest their food externally, whereas detritivores do it internally in the digestive system.
i hope this helps! :)
What body system is the human heart part of?
Answer:
the answer will have to be The heart is apart of the circulatory system.
Explanation:
Which of these types of muscles are striated? Check all of the boxes that apply.
1) skeletal muscles
2) cardiac muscles
3) smooth muscles
Answer:
Muscle Types: Cardiac and skeletal muscle are both striated in appearance, while smooth muscle is not. Both cardiac and smooth muscle are involuntary while skeletal muscle is voluntary.
Answer: skeletal muscles & cardiac muscles
Explanation: Skeletal and cardiac muscles are striated. Smooth muscles are not.
what is the word for a sequence of steps used to define and solve a problem
Answer:
Algorithm
Explanation:
Algorithm is the process that requires steps. Say for instance you are walking to school, and you don't want to step on a crack. You simply will step over one, and keep on going till you reach school. That's an algorithm.
Hope this helped, and please mark as Brainliest <3
A scientist observes the cells of a newly discovered organism under a microscope. The organism has mitochondria, a cell wall, lysosomes, and ribosomes. Is this organism a plant or an animal, and how do you know? A. The organism is a plant, because it has lysosomes. B. The organism is an animal, because it has mitochondria. C. The organism is a plant, because it has a cell wall. D. The organism is an animal, because it has ribosomes.
Answer:
think the answer is:
C. The organism is a plant because it has a cell wall.
Explanation:
only plant cells have Cell Walls
complex interactions must occur before solar energy is converted into a form of energy humans need to work and perform many life processes truth the sequence that best shows the path of energy
A) radiant energy --> mechanical energy --> chemical energy
B) heat energy --> light energy --> photosynthesis
C) radiant energy --> chemical energy --> mechanical energy
D) mechanical energy --> chemical energy --> radiant energy
Compare and contrast the structure and function of DNA and RNA.
▪ Identify the bases used in DNA and RNA and how they pair – classify
each as a purine or pyrimidine
Answer:
DNA has a double- helix structure which means it has two strands. The DNA strands are made from sugar (Deoxyribonucleic), phosphates and nitrogenous bases. There are 4 nitrogenous bases, 2 purine and 2 pyrimidine. The 2 purine bases are Adenine and Guanine. The pyrimidine bases are Thymine and Cytosine. DNA gives our genes.
RNA is a single strand unlike DNA. The strands are made from sugar (ribonucleic), phosphate and the nitrogenous bases. There are 4 nitrogenous bases 2 purine and 2 pyrimidine. The 2 purine bases are Adenine and Guanine. However, the 2 pyrimidine bases are Uracil and Cytosine. The function of RNA is to contribute to releasing proteins based on our rRNA and tRNA and mRNA. This process is known as RNA and transcription.
Explanation:
When a dog chases a rabbit, which combination of body systems work together to supply the animals' muscle cells with the materials they need for energy?
A.Excretory, nervous, digestive
B.Muscular, circulatory, immune
C.Integumentary, digestive, endocrine
D. Digestive, circulatory, respiratory
What do the arrows represent?
the magnetic field
thermal energy
light energy
the electric field
Answer:
the answer is A
Explanation:
Answer:
A. the magnetic field
Explanation:
Have a nice day/night :D
Which statement best describes the function of the nervous system in the body?
O to protect other organs and tissues
O send messages to body parts using only chemicals
O to gather information through the senses (stimuli) and also control all other body systems
O to transport oxygen and carbon dioxide
Answer:
i think that the answer might be B
The first one to get it right gets brainest.
Answer:
D.Tropical Rainforest
what are basics of fungi
Answer:
Explanation:
Fungi are heterotrophs and, like animals, obtain their carbon and energy from other organisms.
Answer:
Fungi are a kingdom of mostly microscopic organisms that are closely related to animals. They include spore-producing organisms such as mushrooms, yeast, and molds. Fungi are almost always invisible to the naked eye. Fungi are made up of masses of tubular filaments called hyphae that penetrate and absorb nutrients from the substrates on which fungi grow. Some fungi have extensive networks of hyphae that enable the fruiting body of the fungi to grow very large, such as many species of the shelf, or bracket, fungi
Explanation:
hope it helps-
Into what kingdom would each of the following be classified: Unicellular prokaryotes that live in dust. ______________________ Unicellular eukaryotes that line in pond water. _____________________ Multicellular eukaryotes that live all over the planet and consume food. ______________________ Unicellular prokaryotes that live in volcanic ash. _________________________ Multicellular eukaryotes that have cell walls and are heterotrophic. _______________________ Multicellular eukaryotes that have cell walls and are autotrophic. ________________________
Answer:
Unicellular prokaryotes that live in dust: Eubacteria
Unicellular eukaryotes that line in pond water: Protista
Multicellular eukaryotes that live all over the planet and consume food: Anamalia
Unicellular prokaryotes that live in volcanic ash: Archaebacteria
Multicellular eukaryotes that have cell walls and are heterotrophic: Fungi
Multicellular eukaryotes that have cell walls and are autotrophic: Plantae
Explanation:
Prokaryotic organisms can be classified into two groups: Eubacteria and Archaebacteria. Eubacteria (i.e.,“true” bacteria) are unicellular prokaryotic microorganisms that live in normal environmental conditions. On the other hand, Archaea (Archaebacteria) are prokaryotic older organisms that thrive in extreme conditions (in this case, volcanic ash). Moreover, eukaryotic organisms can be classified into four kingdoms: Protista, Plantae, Fungi and Animalia. Protista are unicellular eukaryotes that live in different aquatic environments (i.e., oceans, ponds, streams, etc). Animals are multicellular, mobile, heterotrophic (i.e., organisms that cannot produce its own food) organisms whose cells lack walls. Fungi are heterotrophic organisms that acquire their food by absorbing dissolved organic compounds, whose cells have cell walls (but they lack chloroplasts). Finally, plants are multicellular autotrophic (i.e., organisms that produce their own food) organisms whose cells contain walls and chloroplasts (to produce food by photosynthesis).
Which kingdom includes multicellular, heterotrophic organisms that absorb nutrients from other dead organisms?
Protista
Animalia
Plantae
Fungi
Answer: Fungi
Explanation:
William built a machine that recycles metal. When
William places metal on the machine's conveyor
belt, the belt begins to move, pulling the metal
toward the rest of the machine. The machine uses
energy to break down the metal so it can be reused.
What characteristics does William's machine share
with living things?
O A. The machine responds to its environment
and reproduces new machines of its own
kind.
O B. The machine responds to its environment
and uses energy.
O C. The machine reproduces new machines of
its own kind and uses energy.
O D. The machine reproduces new machines of
its own kind and is made of cells.
Answer:
O B. The machine responds to its environment
and uses energy.
Explanation:
also THE MAN BEHIND THE SLAUGHTER im soo sorry i had to (≧w≦)
Identify the bonds formed between RNA nucleotides by RNA polymerase.
A. Ester
B. Glycosidic
C. Peptide
D. Phosphodiester
Answer:
D. Phosphodiester
Explanation:
Just as the DNA polymerase serves as a catalyst in the replication of the DNA, so does the RNA polymerase speed up the formation of the RNA. RNA polymerase performs its function of linking nucleotides when the phosphodiester bonds are formed in the 5' to 3' sequence. Nucleoside triphosphate precursors such as the Adenosine triphosphate, Cytosine triphosphate, and Guanosine triphosphate serve as the substrates that allow the formation of the RNA molecule.
When the RNA polymerase unwinds the double helix structure of the DNA found before the active site where the polymerization will occur, substrates can then pair themselves in a complementary form.